#include <stdio.h>
#include <fcntl.h>
#include "./tool.h"

int main()
{
    printf("add new API");
    printf("hello world\n");
    printf("7+8 = %d\n", add_num(7,8));
    printf("15-7=%d \n", minus_num(15, 7));

    return 0;
}